Hamilton County, Ohio facts for kids

Kids Encyclopedia Facts
Hamilton County, Ohio
Seal of Hamilton County, Ohio
Map
Map of Ohio highlighting Hamilton County
Location in the state of Ohio
Map of the USA highlighting Ohio
Ohio's location in the U.S.
Statistics
Founded January 2, 1790
Seat Cincinnati
Largest City Cincinnati
Area
 - Total
 - Land
 - Water

413 sq mi (1,070 km²)
406 sq mi (1,052 km²)
6.7 sq mi (17 km²), 1.6%
PopulationEst.
 - (2016)
 - Density

809,099
1,987/sq mi (767/km²)
Time zone Eastern: UTC-5/-4
Website: www.hamilton-co.org
Named for: Alexander Hamilton
County logo Logo of Hamilton County, Ohio

Hamilton County is a county located in the southwest corner of the U.S. state of Ohio. As of the 2010 census, the population was 802,374. making it the third-most populous county in Ohio. The county seat is Cincinnati. The county is named for the first Secretary of the Treasury, Alexander Hamilton.

Hamilton County is part of the Cincinnati-Middletown, OH-KY-IN Metropolitan Statistical Area.

History

Most of Hamilton County was originally owned and surveyed by John Cleves Symmes, and the region was a part of the Symmes Purchase. The first European-American settlers rafted down the Ohio River in 1788 following the American Revolutionary War. They established the towns of Losantiville (later Cincinnati) and Cleves.

Hamilton County was organized in 1790, as the second county in the Northwest Territory. Its area then included about one-eighth of Ohio, and had about 2,000 inhabitants (not including the remaining Native Americans). The United States persuaded most of the Shawnee and other Indian peoples to remove in the 1820s to locations west of the Mississippi River.

Since then, other counties were created from Hamilton, reducing the county to its present size. Rapid growth occurred during the 1830s and 1840s as the area attracted many German and Irish immigrants, especially after the Great Famine in Ireland and the revolutions in Germany in 1848.

During the Civil War, Morgan's Raid (a Confederate cavalry campaign from Kentucky) passed through the northern part of the county during the summer of 1863.

Geography

Cincinnati oh skyline
Cincinnati, Ohio viewed from the SW, across the Ohio River, in Kentucky.

According to the U.S. Census Bureau, the county has a total area of 413 square miles (1,070 km2), of which 406 square miles (1,050 km2) is land and 6.7 square miles (17 km2) (1.6%) is water.

Geographic features

The county lies in a region of gentle hills formed by the slopes of the Ohio River valley and its tributaries. The Great Miami River, the Little Miami River, and the Mill Creek also contribute to this system of hillsides and valleys. No naturally occurring lakes exist, but three major manmade lakes are part of the Great Parks of Hamilton County. The largest lake by far is Winton Woods Lake covering 188 surface acres followed by Miami Whitewater Lake covering 85 surface acres and Sharon Lake covering 36 surface acres.

The county boundaries include the lowest point in Ohio, located in Miami Township, where the Ohio River flows out of Ohio and into Indiana. This is the upper pool elevation behind the Markland Dam, 455 feet (139 m) above sea level.

The highest land elevation in Hamilton County is the Rumpke Sanitary Landfill at 1,045 feet (319 m) above sea level in Colerain Township.

Adjacent counties

Demographics

Historical population
Census Pop.
1800 14,692
1810 15,258 3.9%
1820 31,764 108.2%
1830 52,317 64.7%
1840 80,145 53.2%
1850 156,844 95.7%
1860 216,410 38.0%
1870 260,370 20.3%
1880 313,374 20.4%
1890 374,573 19.5%
1900 409,479 9.3%
1910 460,732 12.5%
1920 493,678 7.2%
1930 589,356 19.4%
1940 621,987 5.5%
1950 723,952 16.4%
1960 864,121 19.4%
1970 924,018 6.9%
1980 873,224 −5.5%
1990 866,228 −0.8%
2000 845,303 −2.4%
2010 802,374 −5.1%
Est. 2016 809,099 0.8%
U.S. Decennial Census
1790-1960 1900-1990
1990-2000 2010-2014

2000 census

As of the 2010 census, there were 806,631 people, 346,790 households, and 212,582 families residing in the county. The population density was 2,075 people per square mile (801/km²). There were 373,393 housing units at an average density of 917 per square mile (354/km²). The racial makeup of the county was 69.2% White, 26.0% Black or African American, 0.1% Native American, 2.3% Asian, 0.01% Pacific Islander, 0.51% from other races, and 2.2% from two or more races. 2.8% of the population were Hispanic or Latino of any race.

There were 346,790 households out of which 30.20% had children under the age of 18 living with them, 43.40% were married couples living together, 14.30% had a female householder with no husband present, and 38.70% were non-families. 32.90% of all households were made up of individuals and 10.60% had someone living alone who was 65 years of age or older. The average household size was 2.38 and the average family size was 3.07.

Hamilton county ohio property value 2011
Hamilton County property value, dollars per square foot-2011

In the county, the population was spread out with 25.80% under the age of 18, 9.60% from 18 to 24, 29.70% from 25 to 44, 21.50% from 45 to 64, and 13.50% who were 65 years of age or older. The median age was 36 years. For every 100 females there were 91.10 males. For every 100 females age 18 and over, there were 86.80 males.

The median income for a household in the county was $40,964, and the median income for a family was $53,449. Males had a median income of $39,842 versus $28,550 for females. The per capita income for the county was $24,053. About 8.80% of families and 11.80% of the population were below the poverty line, including 16.20% of those under age 18 and 8.70% of those age 65 or over.

2010 census

As of the 2010 United States Census, there were 802,374 people, 333,945 households, and 197,571 families residing in the county. The population density was 1,976.7 inhabitants per square mile (763.2/km2). There were 377,364 housing units at an average density of 929.7 per square mile (359.0/km2). The racial makeup of the county was 68.8% white, 25.7% black or African American, 2.0% Asian, 0.2% American Indian, 0.1% Pacific islander, 1.1% from other races, and 2.1% from two or more races. Those of Hispanic or Latino origin made up 2.6% of the population. In terms of ancestry, 31.0% were German, 14.7% were Irish, 7.7% were English, and 6.6% were American.

Of the 333,945 households, 29.7% had children under the age of 18 living with them, 39.4% were married couples living together, 15.4% had a female householder with no husband present, 40.8% were non-families, and 33.9% of all households were made up of individuals. The average household size was 2.34 and the average family size was 3.04. The median age was 37.1 years.

The median income for a household in the county was $48,234 and the median income for a family was $64,683. Males had a median income of $48,344 versus $37,310 for females. The per capita income for the county was $28,799. About 11.1% of families and 15.4% of the population were below the poverty line, including 22.9% of those under age 18 and 9.0% of those age 65 or over.

Hamilton County vote
by party in presidential elections
Year Republican Democratic
2016 42.5% 173,665 52.7% 215,719
2012 46.2% 193,326 52.5% 219,927
2008 46.0% 195,530 53.0% 225,213
2004 52.5% 222,616 47.1% 199,679
2000 54.0% 204,175 42.8% 161,578
1996 50.1% 186,493 43.1% 160,458
1992 47.7% 192,447 36.8% 148,409
1988 61.3% 227,004 37.9% 140,354
1984 63.3% 246,288 36.1% 140,350
1980 57.7% 206,979 36.0% 129,114
1976 59.8% 211,267 38.4% 135,605
1972 65.6% 239,212 32.7% 119,054
1968 50.2% 183,611 37.0% 135,057
1964 44.7% 161,179 55.3% 199,127
1960 54.5% 211,068 45.5% 176,215

Transportation

Further information: Transportation in Cincinnati

Major highways

Interstate 71, Interstate 74, Interstate 75, Interstate 471 and Interstate 275 serve the county. The Norwood Lateral and Ronald Reagan Cross County Highway are also prominent east-west thoroughfares in the county.

Railroads

CSX Transportation, Norfolk Southern, RailAmerica, and Amtrak.

Recreation

The county, in cooperation with the City of Cincinnati, operates the Public Library of Cincinnati and Hamilton County system with a main library and 41 branches. Major sports teams are listed under the communities in which they are located, primarily Cincinnati. The Great Parks of Hamilton County district resides within Hamilton County and maintains a series of preserves and educational facilities. Three of the largest parks within the system are Miami Whitewater Forest, Winton Woods, and Sharon Woods. The Hamilton County Fair is the oldest county fair in Ohio.

Communities

Map of Hamilton County Ohio With Municipal and Township Labels
Map of Hamilton County, Ohio with Municipal and Township Labels

Cities

Villages

Townships

  • Anderson
  • Colerain
  • Columbia
  • Crosby
  • Delhi
  • Green
  • Harrison
  • Miami
  • Mill Creek (defunct)
  • Springfield
  • Sycamore
  • Symmes
  • Whitewater

Census-designated places

Unincorporated communities

Neighborhoods of Cincinnati

Images for kids


Hamilton County, Ohio Facts for Kids. Kiddle Encyclopedia.